Home / 2,178.36-3,005.64-1,515.24

Finding the Fourth Proportional to 2,178.36, 3,005.64 and 1,515.24

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Solution

The fourth proportional to 2,178.36, 3,005.64 and 1,515.24 is: 2,090.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.36 : 3,005.64 = 1,515.24 : x
  2. Step 2: Convert to fraction form
    2,178.36/3,005.64 = 1,515.24/x
  3. Step 3: Cross multiply
    2,178.36x = 3,005.64 × 1,515.24
  4. Step 4: Simplify right side
    2,178.36x = 4,554,265.95
  5. Step 5: Solve for x
    x = 4,554,265.95/2,178.36
  6. Step 6: Final answer
    x = 2,090.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.